Scaffold for ship construction



D McLEOD. 4$CAFF0LD FDR SHIP CONSTRUCTlON.

APPLICATION man JAN. 12. I920.

1,409,559. Patented Mar. 14,1922.

Daria Id 1701004 bracket.

I UNITED STATES PATENT oral car DONALD MCLEOID, or TACOMA, wasnmeron.

SGAFFOLD FOR' SHIP CONSTRUCTION.

T 0 all whom it may concern:

Be it known that I DONALD MoLnoD, a citizen of GreatBritainfand resident of the city of Tacoma, county of Pierce, a nd State of ashington, have invented certain new and useful lmprovements in Scaffolds for Ship Construction, of which the following is a specification. f

, This invention relates to newand useful improvements in scaffolds and more particularly to scaffolds employed inship'construc; tion, and it has for its object the provision of an improved device of this nature constructed in such manner as toadapt it to support platforms of varyi'ngwidths. This is desirable because the practicevaries; in different ship-yards, with respect to vthe number of planks employed to constitute a platform, and in additiomithe fact that the sides of ships are not constructed on straight lines, results in certain portions of the ship being spaced further from: the upright portion of the scaffolding than otherportion's thereof and; it, therefore, becomesdesirable to provide neans A for easilyand quickly varying the extent to which the platform supporting'parts of the structure projectbeyond the vertical portions of the scaffolding in accordance vwith the space available, c

A further object .oftheinvention resides in providing a structure of thejcharacter indicated, whichwill possess the necessary rigidity when in use but willbe capable of 7 being folded tooccupya. smaller space when being transported from place to place;

Further objects and advantages of the lin vention willbe setjforth. in the detailed descriptionwhichnow follows. I

In the accompanying drawing:

Figure lis, a perspsctive view of a scaffold Figure 2 is a plan view of the sanielf Figure .3; isa fragmentary side'elevationj showing the bracket in partly folded position.

Figure 4 is a similar view showing the parts in the position they occupy when reversed. V

Figure 5 is an, end elevation of the scaffold brackets, supported upon upright members which constitute theframe of the scaffold.

Figure 6 is a side elevation of the scaffold parts as shown in Figure 5.

Like numerals designate corresponding parts throughout the several figures of the drawing. r

Specification of Letters'Patent. "Patented B131. 14, 1922- Application filed January 12, 1920. :Serial no. ssdsva. l i

In the drawing, ,l djesignates uprights,

which, with the connectingv transverse members 3 constitute the:uprightportions ofthe frameof the scaifold. Y Secured to the transverse members 3 are scaffold brackets each comprising a pair of member Div'otallybon- 4 nected end to end, and either ofavhi ch is adapted to constitute the elementthat 1s secured to. the corresponding transverse-memw areformed of angle. iron of L}shape in c'ross sect1on,, and the;1vert1cal,portions of the memb r a P je n -Q Spao m be tween the verticahportions of the members 4 and plates 6,-said plates being held 111 spaced relation; to the v rtical portions of the members 4 by filling blocks 7,'the 'several fastening devices 7; f V I It will be noted, by referring to Figure 5, that the members 9 are materially shorter partsbeing tied together by rivets or other than the members 4, and it willlalso bass s that each of the nemb rsa d Q jislg'provided with openings l 'and' f9, respectively,

'which'serve to receive bolts or other fastening devices, indicatedat 14, by whiclij the scaffold brackets'ere securedft'o the correparts arecorrespondingly beveled at and 8, respectively, in such manner a's to permit these members-to be folded abovejthejhori- -z o ntal with 7 respect to each the bracket ;by extending f-the lend of i the member is; short distance beyond the'pivot prevents lateral movement of the extended member.

spending transverse inen' bers fil. -It wil'l be noted that by virtue of the construction del I scribed, the inner ends of the vertical portions of; the members '9'are: brou ghtfinto auneme t with the'fillingblocksi, and these that b n t i 1 To permit upward folding of the extended I member a portion of the horizontal flange of the supporting member is cut away between the end of the filling block 7 and slightly forward of'the pivot point, as at 22, so that the end of the swinging member may move downwardly therethrough when the outer end of the bracket is raised. Furthermore, a portion 23 of the lower flange of the member 9 is offset so as to fill the open space of the fixed member when the bracket is extended and the confronting portions of the members 1 and 9 abut each other at 12 and 16, and an inclined shoulder 24:, which leads into the offset flange 23, engages a correspondingly inclined face 25 at the end of the flange portion 21 to wedge the parts tightly in abu ment and give stiffness to the bracket.

It is to be noted that when the scaffold brackets are attached to the transverse members 3 of the frame work of the scaffold, the pivot points 13 lie outwardly of the said uprights. If it becomes necessary to move the scaffold, as a whole, from one place to another, the members 9 may be folded over upon the members 4 during the transport-ation of the scaffold. It will be readily understood that when the members 4 are: secured to the transverse members 3 the horizontal portions of the members 9 constitute the supports for planks 20, these planks constituting the supports upon which a'workman may stand, and it will further be understood that when the members 9 are secured to the transverse members 3 by the reversal of the scaffold brackets, the horizontal portions of the members 1 then constitute the support for-said planks.

It is to be understood thatthe invention is not limited to the precise construction set forth but that it includes within its purview whatever changes fairly come within either the terms or the spirit of the appended claims. v i

What I claim as new is:

1. The combination with a scaffolding structure including uprights'and horizontal,

Y transverse members fixed to and uniting: said uprights of platform supports each comprising inner and outer pivotal'ly connected members with the inner members thereof attached to the transverse members of the scaffoldingstructure in such position that the pivot points of said platform supports will lie outwardly of the said uprights, and in such manner as to permit the outer members thereof to fold upwardly above thehorizontal, and each of said inner members having a flanged portion thereof extended beyond the pivotal point to underlie and serve as a support for the outer member.

2. A construction as in claim 1 wherein the same platform supports each comprises a pair of angle iron members substantially L-shaped in cross section with their ends member is cut away and is adapted to en-' gage the said abutment member when the parts are extendedhorizontally.

4. The combination with a scaffolding structure including uprights and substantially horizontal transverse members fixed to and unitingsaid uprights, of platform supports comprising inner and outer angle iron members adapted to be interchangeably attached to the horizontal, structuralmembers with. the pivot points disposed outwardly of the uprights; said members being substan tially L-shaped in cross section, overlapped and nested at their ends and pivotally connected together in such a manner as to "permit the extended member to fold upwardly above the horizontal but not downwardly below the, horizontal; thedistanee from'the pivotal point to the end of one member being angle member having an inclined face adapted to be engaged by the correspondingly materially greater than the distance from the pivotal point'to the. end of the other of said members, an abutment fixed to the outer clinedinner end of the'inner angle member when the parts are horizmitahthe lower flange of the outer member being cut away between the saidabutment and pivotal point to perm'it the'end of the inner member to swing downwardly therethrough. r f

Signed-at Taco-ma, Vli'cashington, th'is30th day of December, 1919. V .f

f 'DONALD'McLE'OD. 

